package com.cj.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.cj.reggie.common.CustomException;
import com.cj.reggie.dto.SetmealDto;
import com.cj.reggie.entity.Setmeal;
import com.cj.reggie.entity.SetmealDish;
import com.cj.reggie.mapper.SetmealMapper;
import com.cj.reggie.service.SetmealDishService;
import com.cj.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.List;
import java.util.stream.Collectors;


@Service
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper,Setmeal> implements SetmealService{
    @Autowired
    private SetmealDishService setmealDishService;
    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDto
     */
    @Transactional
    public void saveWithDish(SetmealDto setmealDto) {
        // 保存套餐基本信息，操作setmeal，执行insert操作
        this.save(setmealDto);

        List<SetmealDish> setmealDishes = setmealDto.getSetmealDishes();
        setmealDishes.stream().map((item)->{
            item.setSetmealId(setmealDto.getId());
            return item;
        }).collect(Collectors.toList());

        // 保存套餐和菜品的关联信息，操作setmeal_dish，执行insert操作
        setmealDishService.saveBatch(setmealDishes);
    }

    @Override
    public void removeWithDis(List<Long> ids) {
        // 查询套餐状态是否可以删除
        LambdaQueryWrapper<Setmeal> queryWrapper= new LambdaQueryWrapper<>();
        queryWrapper.in(Setmeal::getId,ids);
        queryWrapper.eq(Setmeal::getStatus,1);
        int count = this.count(queryWrapper);
        if (count>0){
            // 如果不能删除抛出业务异常
            throw  new CustomException("套餐售卖不能删除");
        }

        // 如果可以删除，先删除套餐表中的数据
        this.removeByIds(ids);
        // 删除关系表中的数据
        LambdaQueryWrapper<SetmealDish> setmealDishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealDishLambdaQueryWrapper.in(SetmealDish::getSetmealId,ids);
        setmealDishService.remove(setmealDishLambdaQueryWrapper);
    }
}
